| Batman Bros. Co-Op | NesDraug | Super Mario Bros. | Action > Platformer | NES | G, T, GP | Complete | 1.2 | 03 Aug 2019 |
| Batman - Tweaked Edition | Turambar | Batman: The Video Game | Action > Shooter | NES | G, T | Improvement | 1.0 | 04 Jan 2016 |
| Batman - Revenge of The Joker SRAM | BillyTime! Games | Batman - Revenge of The Joker | Action > Platformer | GEN | O | Improvement | 1.1 | 23 Apr 2021 |
| Batman - Playable Ezio from Assassin's Creed | Cakewarden | Batman: The Video Game | Action > Shooter | NES | G, O | Improvement | 1.0 | 30 Oct 2016 |
| Batman - how it should have been | wolfamancer97 | Batman: The Video Game | Action > Shooter | NES | G, L, T, O | Improvement | final | 03 Jan 2019 |
| Batman (Easy) | hiro1112 | Batman: The Video Game | Action > Shooter | NES | L, GP | Improvement | 1.0 | 18 Jan 2008 |
| Baten Kaitos Origins Undub patch | RyleFury | Baten Kaitos Origins | Role Playing | GC | S | Improvement | 1.0 | 03 Apr 2020 |
| Baten Kaitos Origins Uncensor Patch | Helsionium | Baten Kaitos Origins | Role Playing | GC | G, S | Improvement | 1.1.0 | 24 Jul 2020 |
| Batadvantage mod | Vikfield | The Adventures of Batman & Robin | Action | GEN | GP | Improvement | 1.0 | 07 Sep 2018 |
| Bass | Hyperganon | Mega Man | Action > Platformer | NES | G, L, T | Complete | 1.0 | 05 Aug 2002 |
| Baseball Stars Graphic Update | grg | Baseball Stars | Sports | NES | G | Improvement | 1.0 | 01 Apr 2010 |
| Baseball Stars 2014 Bases Reloaded | shadowinthelight | Baseball Stars | Sports | NES | G, T, GP | Improvement | 1.0 | 26 May 2014 |
| Baseball Simulator 2014 | Proveaux | Baseball Simulator 1.000 | Sports | NES | G | Addendum | 1.0 | 19 Feb 2015 |
| Baseball Simulator 2014 | keithisgood | Baseball Simulator 1.000 | Sports | NES | G, T, GP | Complete | 1.1 | 29 Apr 2014 |
| Baseball Simulator 2013 | Proveaux | Baseball Simulator 1.000 | Sports | NES | G | Addendum | 1.0 | 19 Feb 2015 |
| Baseball Simulator 2013 | keithisgood | Baseball Simulator 1.000 | Sports | NES | G, T, GP | Complete | 1.0 | 18 Mar 2013 |
| Baseball Simulator 2012 | keithisgood | Baseball Simulator 1.000 | Sports | NES | G, T, GP | Improvement | 1.0 | 03 Jul 2012 |
| Bart's Nightmare Redux | BillyTime! Games | The Simpsons - Bart's Nightmare | Action | GEN | GP | Improvement | 1.1 | 04 May 2021 |
| Bare Knuckles III - Character Hack | RedCrimson | Streets of Rage 3 | Action > Beat 'Em Up | GEN | G, GP | Improvement | 1.0 | 21 Jan 2012 |
| Bare Knuckle III: No Music | Yoni Arousement | Streets of Rage 3 | Action > Beat 'Em Up | GEN | S | Improvement | 1.0 | 10 Feb 2021 |
